In SEU you need to know many commands for an action, in a graphical editor (like MiWorkplace) things are done differently as you have more options like text selection or scrolling and paging up and down. And some times you don't have a direct equivalent to a key command but you can achieve the same goal on a different route.
SEU: C , Cn , CC
MiWorkplace: Select the text via the cursor (either mouse or keyboard). MiWorkplace also lets you copy parts of a line instead of the whole line. With CTRL+A you can select the whole code. CTRL+C copies the text to the clipboard.
SEU: M, Mn, MM
MiWorkplace: Moving parts of the line can be achieved with selecting the text and then copying and removing the text in one move with CTRL+X. Then paste the code at the position you want with CTRL+V.
You can also move the lines up and down one or more lines. Just select the lines you want to move and press ALT+ARROW UP for move the selected line(s) one line up. The same goes for moving line(s) down with ALT+ARROW DOWN.
SEU: see Repeat MiWorkplace: CTRL+SHIFT+D will duplicate the current line.
SEU: D, Dn, DD
MiWorkplace: CTRL+D deletes the current line. To delete only part of a line just use BACKSPACE or select the text and press DEL.
SEU: FIND , F
MiWorkplace: Use the Find/Replace dialog, CTRL+F
SEU: I, In
MiWorkplace: ENTER puts a newline at the current cursor position. SHIFT+ENTER will put a newline at the end of the current line and thus adding a blank line one line below the current line.
SEU: L, Ln, LLn
MiWorkplace: First select the lines you want to move. SHIFT will move all selected lines to the right by one identation (4 spaces, see preferences). SHIFT+TAB will shift the lines to the left by one indentation.
SEU: O, On, OO
MiWorkplace: To replace a block of text with the text in the clipboard just select the text you want to replace and press CTRL+V to insert the text from the clipboard. The selected text will be replaced with the one from the clipboard.
SEU: TOP or enter line number 1
SEU: BOTTOM or enter last line number
SEU: n (enter line number)
MiWorkplace: CTRL+L opens a dialog where the target line number can be entered.
The editor can also be put into block selection mode. The button is right to the editor tab title. You can now select a block of one or more columns and edit the text accordingly.
Most user exits program are used to compose some lines of code like a template. MiWorkplace will support templates and snippets which will provide similar functionality.